>> reporter: what's happened, say clinton and others, is that millions of uninsured americans are finally covered or soon will be. in large part because so many of them, like the morgans, can no longer be rejected for preexisting conditions. vice president joe biden's former economic advisor jared bernstein. >> if you repeal the affordable care act, what you just heard is part of what you lose. >> reporter: now it may seem unfair to the republicans to pit them against a heart-rending case study. but the unlimited amount spend on mark morgan's care illustrates one of their key arguments, that america's health care system costs more than anyone else's yet gets no better results. because we rely on government, said vice president shall candidate paul ryan in tampa, not on a competitive market. >> obama-care comes to more than 2,000 pages of rules, mandates, taxes, fees, and fines that have no place in a free country.